Power battery charging and performance testing equipment with negative pressure

Abstract

The invention provides a power battery charging and performance testing device with negative pressure, which includes a first isolation transformer, a first reactor, a first AC / DC converter, a DC bus, n DC / DC bidirectional converters, A corresponding number of n double-connected output switches and battery packs, it also includes a second isolation transformer, a second reactor, a second AC / DC converter, a negative voltage power supply, a negative voltage power supply control switch, and n negative voltage power supply inputs The switch, the present invention is connected to the upper computer, through the action of the above-mentioned switches, the connection form of the circuit is changed, the switching of the negative power supply is changed, and the conversion of different charging modes is implemented. It also has the function of charging or detecting the battery pack when the battery pack does not show electricity or shows negative pressure. The device of the invention is stable, reliable and easy to operate, and can be applied to the fields of charging, discharging and testing of various power batteries.

Description

technical field [0001] The present invention relates to the technical field of power supply system, charge and discharge detection equipment and charge and discharge control, and in particular to detection equipment for activating and testing charge and discharge performance of power batteries with no polarity or negative polarity—power battery performance with negative pressure Testing Equipment. Background technique [0002] With the rapid development of the new energy industry and continuous breakthroughs in battery technology, various new types of batteries are also emerging. Some special batteries are quite different from conventional lithium batteries, lead-acid batteries, etc., for example, they need to be charged and discharged in a specific environment or need to be heated before they can be used. Since most of the domestic battery testing equipment is designed for conventional batteries, the testing of negative pressure batteries basically uses equipment imported ...

AI Technical Summary

Problems solved by technology

However, due to the bucK-boost circuit structure or its modified circuit structure, it is difficult to achieve 0V charging in the true sense, and it is also impossible to achieve dual-level charge / discharge (that is, both positive and negative voltages can be charged / discharged).

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